Alpha Polymers' AP110 1/2 lb. Open-Cell Regular Spray Foam Insulation (Part B) is specifically engineered for use with open-cell spray foam, offering flexibility and ease of application. The foams 1/2 lb. density provides optimal expansion properties, allowing it to fill gaps and cracks effectively, ensuring complete coverage without over-expanding. The regular formulation is the go-to choice for general use, offering a balance of performance and affordability while maintaining environmental benefits like low VOCs and non-toxicity. Its a trusted choice for contractors who need dependable and sustainable insulation for a range of projects.