Road-Opener (also called Blockbuster) is more of a recipe family of spiritual products - condition oils, bath products, candles, floorwashes, powders, etc., but it also refers to the spellwork associated with these products.
All quality Road-Opener supplies have a particular herb in it called Abre Camino along with various citrus ingredients and other cleansing botanicals. Many, many practitioners use road-opening spiritual work in conjunction with other spellwork to shake up a stubborn case, remove obstructions in the work, and open up possibilities. I really like it in combination with employment workings.
Here's a reputable link with spell ideas:
As an aside, some practitioners do road-opening candlework with gun powder. When/if the candle explodes, the blockage has been removed. Obviously i don't recommend this.