BASF WALLTITE® Max W (Winter Reactivity) Closed-Cell Spray Foam Insulation Resin (B-Component), 500 lb
Regular price $1,966.03Closed-cell spray foam resin (B-component), winter reactivity
BASF WALLTITE® Max W is a closed-cell spray polyurethane foam resin (Part B) formulated for colder “winter” application conditions. When mixed 1:1 by volume with BASF Elastospray 8000A isocyanate, it produces a medium-density foam designed to help reduce air and moisture infiltration while delivering high thermal performance.
Key Features:
- Cold-Weather Formulation: “W” reactivity is designed for application in colder, winter conditions.
- High Thermal Performance: Delivers an R-value of R-7.4 for strong insulating efficiency.
- Air & Moisture Control: Closed-cell foam helps control air infiltration and moisture infiltration when properly installed.
- Efficient Application: Maximum lift thickness up to 4 in per pass (up to 3.5 in back-to-back with no dwell time, per product description).
- Code/Assembly Approvals: Includes NFPA 285 and UL 263 fire-rated assembly approvals with code compliance reports (per product description).
Specifications Table:
| Specification | Details |
|---|---|
| Product name | BASF WALLTITE® Max W "Winter" Reactivity - Closed Cell Spray Foam Insulation Resin (B-component) - 500 LBS |
| Brand | BASF |
| Series | WALLTITE Max Series |
| Category | Spray Foam Insulation |
| Type | Closed-cell Medium-Density |
| Component | Part B (resin / polyol) |
| Net content | 500 lb |
| Color | Amber |
| R-value | R-7.4 |
| Nominal density | 1.8 to 2.0 pcf |
| Viscosity | 600 to 800 cPs |
| Temperature rating | 20 to 45 °F |
| Storage temperature | 50 to 80 °F |
| Shelf life | 6 months |
| Maximum lift thickness | 4 in per pass |
| Back-to-back pass guidance | Up to 3.5 in passes applied back to back with no dwell time required |
| Mix ratio / pairing | Mixed equally by volume with BASF Elastospray 8000A isocyanate (Part A) |
| Application conditions | Winter conditions; "W" reactivity for colder weather conditions |
| Composition summary | Part B component (resin / polyol) of SPF system containing blowing agent, water, polyols, catalysts, surfactants, additives and flame retardants |
| Approvals (per description) | NFPA 285 and UL 263 fire-rated assembly approvals; code compliance reports |
| Feature highlights (from listing) | Superior thermal insulation; Controls moisture infiltration; Controls air infiltration; FEMA Class 5 flood damage resistant rated material; Non-fibrous; Structural enhancement; Speed of installation |
| Warning | California Residents: Proposition 65 Warning www.P65Warnings.ca.gov |
Frequently Asked Questions (FAQ):
Q: Is this a complete spray foam kit by itself?
A: No. This is the Part B (resin/polyol) component and must be mixed equally by volume with BASF Elastospray 8000A (Part A isocyanate) to create the foam.
Q: What temperatures is this “Winter Reactivity” product intended for?
A: The listing shows a temperature rating of 20 to 45°F and notes it is intended for winter conditions.
Q: What is the maximum pass thickness during application?
A: The product description lists a maximum lift thickness of 4 inches per pass, with up to 3.5-inch passes applied back-to-back without dwell time.
Q: How should it be stored and how long is the shelf life?
A: The listing specifies 50 to 80°F storage temperature and a 6-month shelf life.
Warmth, Quiet, and Control—Hidden Behind the Walls
WALLTITE® Max W is the kind of luxury you don’t see, but you feel immediately: a calmer interior, steadier temperatures, and a home that’s beautifully sealed from drafts and damp. Its closed-cell build brings a sense of architectural confidence—adding performance while helping control air and moisture movement. Use it to elevate comfort in the most exposed zones—rim joists, cantilevers, and exterior walls—especially when winter weather is part of the design brief. It’s a foundational upgrade that makes every finish layer feel more intentional, more refined.
Choose BASF WALLTITE® Max W to lock in high-performance insulation and cold-weather application flexibility for your next spray foam job.
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