快速回答： 买家正在 waterborne plastic sealers usually get a cleaner first shortlist when they stop treating every plastic-panel defect like one vague additive problem and instead separate three different jobs. CHLUMIWE® 3071 should move first when the real bottleneck is difficult-surface wetting, first-contact spread, or penetration onto a harder-to-wet plastic surface. CHLUMIAG® 3467 deserves the earlier screen when the sealer still shows a compatibility-first crater, fisheye, or pullback problem inside the sealed layer. CHLUMILE® 3345 is the cleaner first move when the sealer already reaches the surface directionally but still needs calmer wetting-and-leveling before basecoat.
That is the commercially useful split. This page stays inside the redirected CHLUMICRYL® coating-and-ink-additives direction and does not drift back to the older photoinitiator cluster. It also is not a duplicate of Longchang’s already-live waterborne plastic coatings, waterborne plastic primers, waterborne plastic basecoats, waterborne plastic topcoats， 或者 waterborne plastic clearcoats pages. It is a narrower waterborne plastic-sealer buyer page for teams that need a more stable sealed surface before the appearance-setting coat goes on.
Why waterborne plastic sealers deserve their own additive page
A waterborne plastic sealer sits in a tighter buyer lane than a broad plastic-coatings page or a later basecoat page. In practical work, the sealer step is often where the formulator tries to normalize a plastic surface, reduce substrate-driven surprises, and build a calmer intermediate film before the next visible layer.
That creates a different first-screen question from a primer page. A primer buyer often is still closer to raw substrate entry and early defect rescue. A sealer buyer usually wants to know which additive deserves the first test when the film already belongs in a bridge layer, but still does not wet the plastic surface cleanly enough, still breaks into crater-like instability, or still levels too unevenly before basecoat.
General industry framing supports that split conservatively. Plastic-coating workflows often force buyers to separate surface entry, formulation compatibility during film formation， 和 sealed-layer leveling quality before the next coat. This outside framing is used here only to shape the page. The product-level facts below stay tied to current Longchang-supported product pages.
What the current company-supported evidence actually separates
- CHLUMIWE® 3071 is supported by Longchang as a polyether-modified polysiloxane 推荐剂量为 0.1% 至 1.0%, use across 紫外线, 溶剂， 和 水基系统, and flexible addition during grinding, stirring， 或者 after production. Longchang also notes a possible foam-stabilizing effect in water-based systems. That makes it a cleaner first route when the waterborne plastic sealer still needs stronger surface entry rather than a later-stage finish correction.
- CHLUMIAG® 3467 is supported by Longchang as a 多组分改性聚硅氧烷 used across 紫外线, 溶剂， 和 水基系统. The current company-supported route keeps together leveling, 反火山口, 基材润湿, and a clear note that it 优先考虑系统兼容性. Longchang also supports water-based usage at 0.5% 至 5% of total formulation.
- CHLUMILE® 3345 is supported by Longchang as a polyether modified polysiloxane positioned directly as a wetting and leveling agent. Longchang supports it across 水性, 溶剂， 和 紫外线系统推荐剂量为 0.1% 至 1.0% and addition during grinding, stirring， 或者 after production. The current company page also notes that co-solvents such as dipropylene glycol methyl ether can enhance the effect.
That is enough company-supported separation to build a real buyer page. The point is not to pretend one additive solves every sealer-stage issue. The point is to help a buyer choose the first better screening route based on what the waterborne plastic sealer actually is failing to do.
快速对比表：哪条路线应该优先显示？
| Buyer priority in waterborne plastic sealers | 最佳首选路线 | 为什么它应该排在第一位 | 主要观察点 |
|---|---|---|---|
| Poor wetting, hesitant spread, or weak first-contact entry on harder-to-wet plastic surfaces | CHLUMIWE® 3071 | Longchang supports it as a low-surface-tension wetting route with broad water-based applicability and flexible addition timing | Water-based systems still need to watch for possible foam stabilization |
| Crater-sensitive breakup, fisheyes, or pullback that read like a compatibility problem inside the sealed layer | CHLUMIAG® 3467 | The supported route keeps together anti-cratering, substrate wetting, leveling, and compatibility-first logic | It is stronger for stability and crater cleanup than for final-surface feel |
| The sealer already reaches the surface, but the sealed layer still needs calmer wetting-and-leveling before basecoat | CHLUMILE® 3345 | Longchang positions it directly as a wetting-and-leveling route with water-based fit and flexible process-stage addition | Use it when leveling is the first gap, not when broad wetting failure or crater instability still dominates |
When CHLUMIWE® 3071 is the better first move
3071 should move first when the waterborne plastic sealer still struggles at first contact. This is the stronger route when the visible problem starts as reluctant wetting, poor spread, or incomplete surface entry on a plastic part, film, or panel that is still hard to read honestly.
That matters because a sealer stage is usually supposed to create a calmer base for the next layer. If the film never reaches a confident early-wetting state, later crater cleanup or leveling routes can be harder to judge.
- Best first-screen use: difficult-surface wetting and first-contact spread
- Supported dosage: 总配方量为 0.1% 至 1.0%
- 主要优势： one direct wetting route that already carries spreadability and broad system applicability
- Main caution: Longchang notes a possible foam-stabilizing effect in water-based systems
In short, 3071 is the better first move when the plastic sealer still needs a cleaner surface-entry benchmark before the formulator decides whether the bigger issue is compatibility or leveling.
当 CHLUMIAG® 3467 是更佳的首选方案时
3467 should move ahead first when the sealer can reach the surface, but still shows craters, fisheyes, pullback, or other signs that the real bottleneck is a compatibility-first leveling and anti-cratering problem. This route is stronger when the issue is not simply poor wetting, but unstable film formation after application begins.
That distinction matters in plastic sealers because the sealed layer often decides whether the basecoat later will be read as a true appearance problem or just an inherited substrate-preparation problem. Longchang’s current product page is useful here because 3467 is not positioned only as a vague silicone additive. The supported route keeps together leveling, 反火山口, 基材润湿， 和 compatibility-first logic.
- Best first-screen use: crater-sensitive and compatibility-led sealer screening
- Water-based dosage guidance: 0.5% to 5% of total formulation on the current company page
- 主要优势： one route that already combines anti-cratering, wetting, and system-compatibility logic
- Main caution: Longchang says this route prioritizes compatibility, so it is best screened when stability comes before finish feel
So 3467 is the better first move when the waterborne plastic sealer still needs a compatibility-first cleanup route before the project moves into a basecoat-facing discussion.
When CHLUMILE® 3345 is the better first move
3345 deserves the earlier screen when the waterborne plastic sealer already reaches the surface directionally, but the buyer still needs a stronger wetting-and-leveling route before basecoat. This is the cleaner first path when the question has shifted away from basic entry or crater rescue and toward how evenly the sealed layer lays down.
Longchang’s current company page keeps 3345 commercially useful here because it is positioned directly as a wetting and leveling agent, not only as a broad surface additive. That makes it useful when the buyer wants one route that can help the sealer form a calmer, more even intermediate film before the next visible layer.
- Best first-screen use: smoother sealed-layer wetting and leveling before basecoat
- Dosage guidance: 总配方量为 0.1% 至 1.0%
- Addition logic: flexible addition during grinding, stirring, or after production
- Main reason to shortlist it: it solves a different first problem from raw surface entry or compatibility-led crater cleanup
This is the stronger first move when the buyer already trusts the sealer’s basic substrate contact, but still needs a calmer film before the basecoat step.
买家在索取样品前应该如何选择
1. Start with the real first failure in the sealer
If the film still struggles to wet the plastic surface, start with 3071. If the sealer reaches the surface but still breaks into crater or fisheye behavior, move 3467 forward. If the layer already forms but still levels too unevenly before basecoat, start with 3345.
2. Keep wetting logic separate from compatibility logic
A sealer that will not spread and a sealer that spreads but then pulls back are not the same additive problem. Separating those routes early usually makes the first sample round cleaner.
3. Keep leveling cleanup separate from both surface-entry and crater rescue
A smoother sealed layer is not just a smaller version of wetting rescue or crater rescue. If the first issue is still surface entry or compatibility-sensitive breakup, a leveling-first route can hide the real bottleneck.
4. Respect the system watchpoints
3071 may stabilize foam in water-based systems. 3467 prioritizes compatibility more than refined finish feel. 3345 is stronger when the line already has a workable substrate-entry window. Those watchpoints are part of the selection logic, not a footnote.
5. Keep the first trial set small and honest
For many waterborne plastic-sealer projects, the cleanest first plan is one 3071 wetting route， 一 3467 compatibility route，以及一个 3345 leveling route. That usually teaches more than forcing several near-neighbor additives into the same opening screen.
本页推荐的龙昌路线
- 先弄湿路线： CHLUMIWE® 3071
- 兼容性优先路线： CHLUMIAG® 3467
- Wetting-and-leveling route: CHLUMILE® 3345
- 集群概览： CHLUMICRYL® 涂层和油墨添加剂
- Related stage page: How to Choose Additives for Waterborne Plastic Primers
- Related next-stage page: How to Choose Additives for Waterborne Plastic Basecoats
- Related substrate page: How to Choose Additives for Waterborne Plastic Coatings
- Related finish page: How to Choose Additives for Waterborne Plastic Clearcoats
- 相关缺陷页面： How to Choose Additives for Coating Fisheyes
常见问题
Which additive should I screen first if a waterborne plastic sealer still will not wet the surface evenly?
Usually 3071, because Longchang supports it as a low-surface-tension wetting route with broad water-based applicability and flexible addition timing that fit the first-contact problem more directly than a crater-only or leveling-only route.
When should 3467 move ahead of 3071?
3467 should move ahead when the sealer can already reach the surface but still shows crater-sensitive breakup, fisheyes, or pullback that read more like a compatibility and leveling problem than a simple wetting shortfall.
When does 3345 make more sense than the other two?
It makes more sense when the film already reaches the surface and the main question has shifted into smoother wetting-and-leveling of the sealed layer before the basecoat step.
Is this page the same as the broader waterborne plastic coating page?
No. The broader waterborne plastic coating page answers the substrate-wide selection question first. This new page is narrower and helps buyers choose between difficult-surface wetting, compatibility-first crater cleanup, and sealer-stage leveling before basecoat.
Can one of these additives solve every waterborne plastic-sealer issue?
No. Their supported first-screen logic is different enough that buyers should not treat them as interchangeable. The faster route is to identify whether the first problem starts at surface entry, crater-sensitive compatibility, or sealed-layer leveling quality.
需要一个更精简的候选名单吗？
If your waterborne plastic-sealer project is stuck between poor surface wetting, crater-sensitive film instability， 和 uneven sealed-layer leveling, stop treating them as the same additive request. Start with the real bottleneck. That usually makes the next CHLUMICRYL® sample decision faster and more commercially useful.