Quick answer: buyers should not treat CHLUMILE® 3345, CHLUMILE® 3432, and CHLUMIAG® 3501 as interchangeable surface additives. 3345 belongs earlier when the project still needs a broad wetting-and-leveling balance across general coating work, especially where water-based or broader coating-system flexibility matters. 3432 deserves earlier review when the visible issue has narrowed into print-face leveling, surface smoothness, or overprint-varnish style laydown. 3501 should move up first when the project already lays down directionally well enough, but still needs a clearer anti-sticking, release-oriented, or downstream handling compatibility route.
This is a narrower buyer-selection page inside the CHLUMICRYL® branch. The broader pages on leveling additives, anti-blocking additives, and CHLUMICRYL® Coating and Ink Additives answer when those additive families belong in the shortlist. This page answers the next B2B question: which of these three routes should be screened first once the buyer already knows the issue is visible laydown or post-dry handling, not a pure defoaming problem?
Why this page deserves to exist beside the broader function and application pages
The live CHLUMICRYL® branch already covers wetting additives, leveling additives, anti-blocking additives, surface-control pages for UV and waterborne varnish work, and application pages such as waterborne topcoat additives, UV overprint varnish additives, furniture coating additives, and offset ink additives. Those pages help buyers choose a stage or application lane.
They do not fully answer a recurring shortlist problem that shows up after that first step: should the next lab sample be a broader wetting-and-leveling route, a print-face leveling route, or an anti-sticking route? That is a real buying decision because many projects move from visible laydown trouble into handling trouble as development progresses. A cleaner comparison page helps buyers avoid testing three nearby silicone labels without a clear hypothesis.
What these three products share, and where they split
All three products sit in the CHLUMICRYL® surface-additive branch and carry broad cross-system relevance. The split starts when buyers check the named product role, the supported application lane, the dosage window, and whether the immediate pain point is liquid-stage laydown or finished-surface handling.
- CHLUMILE® 3345: Longchang supports it as a wetting and leveling agent with recommended dosage of 0.1% to 1.0%, addition during grinding, stirring, or after production, optional pre-dilution with water, alcohols, alkanes, or aromatics, and the practical note that adding co-solvents such as dipropylene glycol methyl ether will enhance the effect. The current company-supported application tables place it in general industrial coatings, coil coatings, vehicle coatings, water-based coatings, and related broader coating routes.
- CHLUMILE® 3432: Longchang supports it as a polyether-modified polysiloxane leveling agent with recommended dosage of 0.05% to 1.0%, any-stage addition, optional pre-dilution with water, alcohols, alkanes, or aromatics, and applicability across UV, solvent, and water-based systems. The current company-supported application tables place it clearly in printing inks, packaging coatings, overprint varnishes, and wood varnish or furniture-coating work.
- CHLUMIAG® 3501: Longchang supports it as a multi-component modified polysiloxane that can be added at any stage or later and used across UV, solvent, and water-based systems. The current product page directly places it in printing inks, inkjet inks, screen inks, overprint varnishes, release coatings, anti-sticking-agent use, wood coatings, and broader coating or handling-sensitive routes.
That is enough company-backed separation to justify a dedicated comparison page without inventing unsupported performance claims.
Quick comparison table: 3345 vs 3432 vs 3501
| Buying factor | CHLUMILE® 3345 | CHLUMILE® 3432 | CHLUMIAG® 3501 |
|---|---|---|---|
| Main product role on current company page | Wetting and leveling agent | Leveling agent | Anti-sticking and broader surface-compatibility route |
| Best first-screen use | Broader coating laydown balance when the job still sits between wetting and leveling | Print-face leveling, smoothness, and varnish-side appearance cleanup | Anti-sticking, release-oriented handling, and downstream surface compatibility |
| Recommended dosage | 0.1% to 1.0% | 0.05% to 1.0% | No fixed dosage captured in the currently used company page extract here, so buyers should confirm the exact use level during sample planning |
| Addition logic | Grinding, stirring, or after production | Any stage | Any stage or later |
| System fit | UV, solvent, and water-based systems | UV, solvent, and water-based systems | UV, solvent, and water-based systems |
| Most explicit application lane | General industrial, water-based, and broader coating routes | Printing inks, packaging coatings, OPV, wood varnish, furniture coatings | Printing inks, screen and inkjet inks, OPV, release coatings, anti-sticking, wood coatings |
| Useful watchpoint | Co-solvent support can enhance effect | Test or inspect before industrial production | Because the attraction is broad application fit, define the real KPI before treating it as a catch-all route |
When CHLUMILE® 3345 is the better first move
3345 belongs earlier when the project is still living in the film-formation stage rather than a finished-surface handling stage. Longchang positions it directly as a wetting and leveling agent, which is important because many buyers are not yet ready to split those two jobs completely. They still need one route that helps the liquid meet the surface and then settle more cleanly.
3345 should move earlier when:
- the coating is already directionally close, but still needs a better wetting-plus-leveling balance,
- the buyer is working in a general coating, water-based coating, coil coating, or vehicle-coating lane instead of a narrower print-face route,
- the team wants a route that can still be added during grinding, stirring, or after production, or
- the lab is still trying to improve broad laydown quality before switching into anti-sticking screening.
The current company-supported note about co-solvents enhancing the effect also makes 3345 useful when the formulator still has room to optimize the liquid-stage package around it.
When CHLUMILE® 3432 is the better first move
3432 deserves earlier review when the buyer has narrowed the problem into a more appearance-led print or varnish lane. Longchang positions it as a leveling route and places it clearly in printing inks, packaging coatings, overprint varnishes, and wood varnish or furniture-coating scenarios. That makes it a cleaner first route when the issue is not broad wetting anymore, but visible print-face or finish-face smoothness.
3432 should move earlier when:
- the printed or coated face still looks uneven after the broader wetting question is mostly under control,
- the buyer needs a route that sits naturally in printing inks, packaging coatings, and OPV work,
- the project lives closer to a varnish, wood-finish, or furniture-finish appearance screen than to a waterborne general-coating route, or
- the lab wants a route with a slightly tighter stated 0.05% to 1.0% window and any-stage addition.
In short, 3432 is often the cleaner move when the buyer already knows the problem is mainly how the visible surface lays down.
When CHLUMIAG® 3501 is the better first move
3501 belongs earlier when the project has started to shift out of visible laydown trouble and into handling trouble after contact. The current Longchang page is unusually clear about the application spread here. 3501 is positioned for printing inks, inkjet inks, screen inks, overprint varnishes, release coatings, and anti-sticking-agent use, while still keeping broad UV, solvent, and water-based system relevance.
3501 should move earlier when:
- the film already lays down directionally well enough, but still needs a stronger anti-sticking or release-oriented route,
- the buyer needs one route that stays commercially sensible across inks, OPV, release coatings, and nearby handling-sensitive workflows,
- the development question has shifted from visible smoothness into stacking, contact separation, or downstream print-side compatibility, or
- the lab wants an any-stage or later-addition route that can stay flexible in sampling.
That makes 3501 the cleaner first answer when the job is no longer “make the liquid look smoother,” but “make the finished surface handle better.”
How buyers should choose between these three routes
1. Start with the stage problem, not the product family name
If the issue still sits in broad coating laydown, start with 3345. If the issue has narrowed into print-face or varnish-face smoothness, move 3432 earlier. If the issue is really downstream anti-sticking or release behavior, move 3501 earlier.
2. Separate visible appearance cleanup from post-dry handling
General industry framing usually treats leveling and anti-sticking as different jobs, even when they can influence the same commercial result. Leveling helps explain surface smoothness during laydown and early film formation. Anti-sticking matters more once the film starts meeting other surfaces during stacking, contact, or later handling. That conservative framing helps keep the first sample round cleaner.
3. Use the application lane as a shortcut
3345 is easier to defend when the project brief still sounds like general coating or water-based laydown work. 3432 is easier to defend when the project sits inside printing inks, packaging coatings, OPV, or finish-surface appearance work. 3501 is easier to defend when the project language already includes anti-sticking, release coatings, or downstream handling compatibility.
4. Do not use 3501 as a lazy catch-all
3501 is attractive because the application list is broad. That is useful, but it can also blur the first lab result if the team has not decided whether the real KPI is sticking, release, surface smoothness, or broader print-side behavior.
5. Keep the first shortlist short
For many buyers, one broad wetting-and-leveling route, one print-face leveling route, and one anti-sticking route teach more than a crowded first trial full of partially overlapping additives.
Recommended Longchang path from this page
- Broader CHLUMICRYL® overview: CHLUMICRYL® Coating and Ink Additives
- Related function page: How to Choose Leveling Additives for Coatings and Inks
- Related function page: How to Choose Anti-Blocking Additives for Coatings and Inks
- Related application page: How to Choose Additives for Waterborne Topcoats
- Related application page: How to Choose Additives for UV Overprint Varnishes
- Related application page: How to Choose Additives for Furniture Coatings
- 3345 product page: CHLUMILE® 3345
- 3432 product page: CHLUMILE® 3432
- 3501 product page: CHLUMIAG® 3501
FAQ
Which additive should I screen first if a coating still needs broader wetting-plus-leveling balance?
Usually CHLUMILE® 3345, because Longchang positions it directly as a wetting and leveling agent and supports it across general coating and water-based routes.
When should 3432 move ahead of 3345?
3432 should move ahead when the broader wetting question is mostly under control and the buyer now needs a more appearance-led print-face, varnish-face, or finish-face leveling route.
When should 3501 move ahead of both 3345 and 3432?
3501 should move ahead when the visible surface already looks directionally acceptable, but the project still has anti-sticking, release, or downstream handling pressure that a pure leveling route will not answer cleanly.
Are these three products interchangeable because they all sit in the same surface-additive branch?
No. Their supported page roles and application lanes are different enough that buyers should not treat them as drop-in substitutes. One is the broader wetting-and-leveling route, one is the more appearance-led leveling route, and one is the anti-sticking and handling route.
Does this page replace application-specific pages like waterborne topcoats or UV overprint varnishes?
No. It sits one layer above those pages as a shortlist aid. Use the application page when the main question is the end-use system. Use this page when the main question is which of these three nearby additive routes deserves the first sample round.
Need a shorter first shortlist?
If your team is stuck between broader coating laydown, print-face smoothness, and anti-sticking handling, define which stage is actually failing before requesting samples. In many projects, that quickly narrows the first screen to 3345 for broader wetting-and-leveling balance, 3432 for appearance-led print or varnish leveling, or 3501 for anti-sticking and handling compatibility.