Transtar 1K Low VOC Speed Sealer, Light Gray, 1Gallon. Transtar 6091 1K Low VOC Speed Sealer is a ready-to-spray acrylic sealer with good holdout properties and excellent adhesion. This non-sanding sealer is ideal for spot and panel refinishing and is designed to provide excellent DOI under a wide range of topcoats. 1K Low VOC Speed Sealer can be applied over sanded factory primers on replacement parts and panels.6091